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burnt computer cause?

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Old Aug 11, 2007 | 09:16 PM
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Default burnt computer cause?

well i had the computer flashed with hp tuners and now my computer is fried causing the whole left side of my car to go blank not even power is getting to the plugs. what should i do go back to stock and sell the parts or try again and hope for the best
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Old Aug 12, 2007 | 12:05 AM
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Without knowing what you meant by "fried", I will suggest that whatever you changed, you change it back to whatever last worked. If you changed the tuning, hopefully you can put the tune back the way it was.
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Old Aug 12, 2007 | 12:32 AM
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Did you post this on LS1 tech as well, Meineke told you it was fried?

If so get that ting to someone who has experience with GM PCM's. NOT MEINEKE

If this isnt you then sorry i got the wrong number :P
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Old Aug 12, 2007 | 10:08 AM
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no that is me but i had my tuner go down and confirm it there and he said the computer was fried. and the computer being fried meens i have now power to my plugs on the left side of the motor
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Old Aug 12, 2007 | 12:05 PM
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If the PCM is toast, you will need a new one, plus the dealer to program that new one. No, you can't do it yourself unless you have a Tech 2. I still have to wonder how it came to be in that condition? If its just a matter of the program wiped out, the dealer "may" be able to re-flash it back to factory specs. But, if the circuits are litterally burned, then there must be a cause and tuning isn't it. You need to identify the cause BEFORE putting in a new one otherwise you will end up with another paper weight.
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Old Aug 12, 2007 | 12:10 PM
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I think that HP tuner has a PCM recovery mode... so it should have been able to fix whatever happened during the flash to "fry" your computer. Have you tried reflashing to see if it can be corrected? If your tuner was the one flashing your computer when it was "fried", I'd be expecting him to help you to resolve this. Now if the problem is electrical and nothing to do with the tuner, I guess you're on your own. Sorry to hear of your troubles - good luck fixing it - Bruce
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Old Aug 12, 2007 | 12:14 PM
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Originally Posted by brucemoose2
I think that HP tuner has a PCM recovery mode... so it should have been able to fix whatever happened during the flash to "fry" your computer. Have you tried reflashing to see if it can be corrected?


I suspect that he can no longer communicate with the PCM, which means he needs a new one.

It is not clear what the sequence of events were that caused this, so it's kind of hard to help...
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Old Aug 12, 2007 | 12:57 PM
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Yeah, if he or whomever was writing to it and the system went down, assuming the comm subroutine being written too at the time, its a brick now. I truly don't know if the dealer can still flash it or not, but it sounds like dealer time for him.
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Old Aug 12, 2007 | 01:54 PM
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well when it happened was when i dissconnected the battery installed a radio and then it shot a #3 misfire then my keyless entry didnt work so i dont know if my computer just blanked or fried there was a lot of corrosion on it i bought another one hopefully getting it flashed with stock program then get it flashed by my programmer
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Old Aug 12, 2007 | 02:11 PM
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I would start by insuring that you haven't tapped some wires with the radio install that you shouldn't have.

What happens when you try to connect to the PCM with HPTuners?
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Old Aug 12, 2007 | 02:40 PM
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Originally Posted by watsonsvett
well when it happened was when i dissconnected the battery installed a radio and then it shot a #3 misfire then my keyless entry didnt work so i dont know if my computer just blanked or fried there was a lot of corrosion on it i bought another one hopefully getting it flashed with stock program then get it flashed by my programmer
The PCM and BCM share a secret internal password between them. A Tech 2 will be needed regardless of the source of the new PCM. The two have to be sinked up to talk to each other again for security reasons. There is a procedure in the manual that will allow you to re-sink the security manually.
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Old Aug 12, 2007 | 04:03 PM
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no but there are 2 wireing harnesses not hooked up one is for the amp and the other is unknown and i cant get ahold of my tuner to figure out what the hp said
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Old Aug 13, 2007 | 02:07 AM
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Originally Posted by dgrant3830
The PCM and BCM share a secret internal password between them. A Tech 2 will be needed regardless of the source of the new PCM. The two have to be sinked up to talk to each other again for security reasons. There is a procedure in the manual that will allow you to re-sink the security manually.
EFI Live can do this so id assume maybe HP tuners can as well which is what his tuner is using, regardless you dont need a tech 2
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Old Aug 13, 2007 | 08:18 AM
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Originally Posted by eurospec1
EFI Live can do this so id assume maybe HP tuners can as well which is what his tuner is using, regardless you dont need a tech 2
Yep. BCM relink. I think there is also a manual procedure.
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Old Aug 13, 2007 | 11:44 AM
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Originally Posted by watsonsvett
no but there are 2 wireing harnesses not hooked up one is for the amp and the other is unknown and i cant get ahold of my tuner to figure out what the hp said
This sounds like you are looking at the BCM and not the PCM. The PCM controls the engine. The BCM controls the Body electronics and I think it has connections to the sound system, but I'm truly not sure. If you are having corrosion on it, then your HVAC system is draining water on it from internal condensation. The drain hole is probably plugged up on the engine side of the firewall. The BCM can be disassembled and carefully cleaned providing you use a grounding wrist-strap and know what you are doing. I would suggest alcohol.
Back to the PCM, if it has corrosion on it, then you should be looking at the battery and leakage from it onto the wiring harnesses around the PCM. Many have had major issues there. You will need to jack the car, remove the right front tire and pull off the wheel housing so you can get to it.
Can you pull the codes?
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